""ET TROJAN Ursnif Variant CnC Beacon - URI Struct M1 (_2B)""
SID: 2033203
Revision: 7
Class Type: trojan-activity
Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_06_29, deployment Perimeter, malware_family ursnif, performance_impact Moderate, signature_severity Major, updated_at 2023_03_10
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
-
Value: "GET"
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Value: "_2B"
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Value: "_2B"
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Value: !"&"
-
Value: !"?"
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Value: !"="
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Value: !"/tr/v1/" Depth: 7
-
Value: !".surveymonkey.com|0d 0a|"
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Value: !"cisco.com|0d 0a|"
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Value: !"trendmicro.com|0d 0a|"
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Value: !"User-Agent|3a 20|TMUFE"
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Value: "Connection|3a 20|Keep-Alive|0d 0a|"
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Value: !"Referer|0d 0a|"
Within:
PCRE:
Special Options:
-
http_method
-
http_uri
-
fast_pattern
-
http_uri
-
http_uri
-
http_uri
-
http_uri
-
http_uri
-
http_header
-
http_header
-
http_header
-
http_header
-
http_header
-
http_header